Universal grinding-machine



S. G. BUSKARD.

UNIVERSAL GRINDING MACHINE. APPLICATION FILED MAR-19' I917.

Patented Apr. 27 1920.

2 SHEETS-SHEET I.

llllllllHHllllIIHIIHHIIHI Inventor.

f W y W S. G. BUSKARD.

UNIVERSAL GRINDING MACHINE.

APPLICATION FILED MAR. 19, 19M.

1,338,355. r Patented Apr. 1920.

2 SHEETS- T 2- ventor.

In .J.

' UNITED s AT s PATENT OFFICE. f

SAMUEL e. BUSKARD, or HAMILTON, ONTARIO, .oANAnA, ASSIGNOR, Bv, EsNEASSIGNMENTS, or ONE-HALF To R. E. T. PRINGLE LIMITED, or TORONTO,

CAN DA.

- To all whom it may concern Be it known that I, SAMUEL GORDON Bus-KA'RD, a subject of the King of Great Britain, and resident of the cityof Hamilton, county of entworth, in the Province of Ontario, in theDominion of Canada, have invented certain new and useful Improvements inUniversal Grinding-Machines, as descrlbed in the followingspecificationand illustrated in the accompanying drawings, that formpart of the same. L I

'The principal obj ects of the lnventi'on are,

to devise a formof machine in which the grinder may be operated in aplaneat any desired angle in relation to the work and may be quickly andaccurately moved to various positions.

A further and important object is to devise a construction in which asmall high speed grinding machine may be universally adj ustablysupported in relation to the work.

The principal feature of the invention consists in the novelconstruction and arrangement of parts, whereby a lOIlgltLlCllnally andlaterally adjustable work table 1s arranged in vertical adjustablerelation to a "tional view of a grinder constructed in accordance withthis invention. i Fig. 2 is a plan view of the machine.

Fig. 3 is. an enlarged vertical sectional view through the grindersupportingcolumn, transversely of the pivot 'of the pivotal head. j

Fig. 3 is a side elevational view of j a modified form of the grindersupporting guide.

view through the grinder head in right angular relation to the view 1nFig. 3.

Like numerals of reference indicate corresponding parts in each figure.

On reference tothe accompanying drawings it will be seen that the typeof machine,

4 is an enlarged vertical sectional UNIVERSAL GRINDING-MACHINE.

Specification of Letters Patent. Patented Apr, 27, 1920, Applicationfiled March 19, 1917. SerialNo. 155,771'. g I

to which the invention is herein shown a-pplied is that of'a verticalcolumn machine with a'swing table. The base 1 supports ,a

rigid column 2 upon which the bracket 3 is rotatably supported, beingraised and lowered thereon by means of the hand wheel 4.

T he-operating connection between the hand wheel 4 and. the column isnot shown as no 'claim' is made upon the structure which is notnew. The.column is provided with a vertical key-way 5 in which a key carried bythe bracket 3 is adapted to slide, said key being adapted tobe withdrawnby means'of the handle 6.

The bracket. 3 is ofsplit type having the paired lugs 7 at the rearthereof adapted to be drawn together to lockthe bracket upon the columnby means of the screwhandlesS.

The column 2 is preferably of tubular form or is bored out at the tophaving the central bore 9. I

10 is apart cylindrical shaped member preferably of correspondingdiameter with the column 2 and having the reduced porthe'bottom formedconcentric with the transverse orifice 16 extending across the jawformed by the upper end of the cylindrical member 10.

17 is a block or table formed with a circular upper end 18 ofcorresponding diam eter with the column and member 10, said table.having a tongue member 19 arranged I centrally of its width adapted tofit into the transverse socket in the member 10. The major portion ofsaid tongue member forms a circle corresponding to and resting withinthe arc-shaped recess 15.

20 is a bolt having the head portion 21 fitting snugly within thetransverse orifice 16 and having a laterally to retain it from rotation.

The bolt 20 is tapered from the head portion 21 and extends through'atapered bushextending key 22 thereof having the arc-shaped recess 15 inI and the outer end 27 is threaded to receive a nut 28 which isbeddedwithin arecess 29 in the-side of the member 10. The table 17 may beswung to any desired position upon the pivot formed by the bolt 20 andthe circumferential surface of the circular portion 24 is marked wlthsuitable protractor gradnations to indicate the degrees of rotation.

30 is a cylindrical block rotatably mounted upon the top of the table 17being centered thereon by the boss 31 and secured by the cap screw 32axially arranged 'therein and threaded intothe hole 33 in the top of thetable 17. p

The block 30 is provided with a pair of upwardly projecting lugs 34 onopposite sides to the top of which is secured a clove tailed guide table35 in which a carriage 36 carrying the grinder 37 is slidably arranged.The grinder 37 is of a small light high speed type of electric motor.

The rotatable member. 10 is graduated upon its periphery at the point ofcontact with the column 2 and the column is likewise graduated into thedegrees of a circle so that the upper end of the column may be rotatedto any desired, angle of setting for the swing of the pivotal block 17.The upper end of the block 17 and the base of the block 30 are alsodivided off into the degrees of a circle and correspondingly marked sothat the upper block may be rotated in definite rotation with the blockon which it is supported. This triple rotatable adjustment, one in afixed transverse plane, one in a vertical plane and the other in atransverse plane carried by the swivel in the vertical plane gives tothedevice the possibility of adjustment to any possible angle ofmovement and the grinder machine is carried upon the table on the uppermember so that it may be moved back and forth as may be desiredaccording to the work.

In addition to the adjustment of the grinder supported upon theadjustable head the work table 38 which is in the form of a transverseslide is carried upon an adjustable table 39 arranged upon a horizontalslide upon the bracket 3. The work may be arranged upon a bed platecarried upon the table 38 or if to be rotated the work is carriedbetween the head stock 40 and the tail stoclc 41. a bracket slidablyarranged upon the table 38 having a grooved pulley 42 secured to thespindle 43, any suitable form of chuck being secured .to the pulley.

' A bracket 44 is slidably arranged upon the table 38 and is providedwith ahinge extension 45 on which a table 46' is pivotally supported.

The head stock is in the form of a rigid guide 49 arranged inperpendicular arrangement and a sliding block 50 operated by the screwhandle 51 moves longitudinally therein.

A block 52 is rotatably mounted on the sliding block 50 and a slidingcarriage 53 operates in the bed thereof, the grinder 54 be ing securedto said carriage.

In the operation of a grinder constructed as described it is possible toadjust the work table in relation to thecolumn both vertically andtransversely or' swing the work table in relation to the column. Thehead of the column may be rotated to change the angle of the verticallyswinging table thereon in relation to the work and the verticallyswinging head may be adjusted so that the grinder may be operated in anoblique direction. tained by rotating the upper block 30 carrying thegrinder carriage which is operated forward and backward by the handscrew.

The modification shown in Fig. 3 allows still further adjustment inangularity.

It will be understood from this descrip tion that a machine constructedas described may be adjusted to any operating position desirable and itis therefore truly universal in its adjustment and renders itsu'sepractically unlimited as it can be adjusted to get at work in anyposition.

The use of such a machine will be very valuable in the manufacture ofsmall and complicated tools. The construction is very simple and thereare no delicate parts to get And further obliquity may be ob-v out oforder and it can be manufactured at very lowcost.

Another important feature is that the grinders are directly operated andthere are no overhead belts to interfere withthe operator and he cantherefore work from any side of the machine with equal facility.

What I claim as my invention is 1. In a universal grinder, a horizontalwork support, a vertical column, a rotatable member adapted to be movedinto oblique relation to said column, means for supporting a grindermember on said rotatable member, a grinder member, and means for movingthe grinder member with its axis parallel with or in planesintersectingthe plane of the work. I

2. In a universal grinder, th'e combination with an adjustable worktable, of a column arranged in vertically adjustable relation to saidwork table, a grinder member, a table supported on a transverselyarranged pivot on said column and adapted to be swung in a verticalplane, a head rotatably mounted on said pivotal table, a guide extendingtransversely of said table, and a carriage slidably arranged in saidguide, said carriage being movable in a plane intersecting the plane ofthe work or parallel therewith.

3. In a universal grinder, the combination with an adjustable worktable, of a column arranged in vertically adjustablerelation to saidwork table, said column having a vertically disposed'socket, a tablehaving a perpendicularly arranged tongue extending into said socket andpivotally secured therein, a block rotatably mounted on said tablehaving its axis of rotation arranged in right angular relation to theaxis of rotation of saidtable, a guide extending transversely of saidblock, a carriage slidably arranged in said guide, and a grinderarranged upon said carriage.

at. In a universal grinder, the combination with an adjustable worktable, of a column arranged in "ertically adjustable relation to saidwork table, said column having a vertically disposed socket extendingdownwardly from the top and arranged centrally of the vertical axis ofsaid column, a

bolt extending transversely through said column in right angularrelation to said socket and across the vertical axis of the column, atable having a tongue extending into said socket and formed with acentral orifice through which said bolt extends and upon which saidtongue is pivoted, a block rotatably mounted on the top of said table, a

slide mounted transversely upon said block, a carriage mounted on saidslide, and a grinder secured to said carriage.

5. In a universal grinder, the combination with an adjustable worktable, of a column arranged in vertically adjustable relation to saidwork table, a cylindrical member rotatably mounted on the top of saidcolumn, a table'being mounted on said ro tatable member and adapted toswing in a vertical plane, a block rotatably mounted n said table, aguide secured to said block and arranged transversely thereof, acarriage mounted in said guide and a grinder secured tosaid carriage. a

6. In a universal grinder, the combination with an adjustable worktable, of av column arranged in vertically adjustable relation tosaidwork table, said column having a central cylindrical recess, acylindrical member mounted on the top of said column and having areduced portion extending into said cylindrical recess, means forlocking said cylindrical member in any desired position of rotation onsaid column, said cylindrical member having a vertical socket in the topthereof arranged centrally of its vertical axis, a bolt extendingtransversely through said cylindrical member centrally of said socket, atable having a tongue extending into said socket and pivotally mountedon said bolt, a block mounted on the top of said table and rotatablearound the vertical axis thereof, a guide secured to andextendingtransversely of said table, a carriage adjustably arranged insaid guide, and a grinder secured to said carriage.

7. In a universal grinder, in combination with the supporting column, ofa universal adjustable grinder head carried by.

said column, a work table adjustably arranged in relation to saidcolumn, a head stock carried on said work table a pivotal said carriage.

S. G. BUSKARD.

